I've been talking about this in my 6.5-375 Ruger thread. I decided to go with a couple of Wildcat 375 Ruger builds in 30 cal and 6.5 after talking with my smith about the process. He seems impressed with it and is planning on doing one of his bore burnig rifles with it. This is the only reason I would consider doing a 6.5-375 Ruger.
I did some googling on it today and found a number of threads from other forums and this video with the guy Bryan mentioned. 5000 rounds and his F-class rifle is still shooting 1/4 MOA.
YouTube - Salt-Bath Nitriding for Rifle Barrels -- Joel Kendrick Interview
Based on this development, if it's as good as it looks like it is, I'll be choosing higher velocity chamberings for future rifles.
For a 7mm, I would go with the 375 Ruger or RUM for LR application.
For a 25 Cal, I'm thinking of a WSM
For a 6mm, I'm thinking of an -06 or WSM
There is supposed to be an increase in velocity which is another bonus. How much seems to be sketchy, but thread poster claimed 200 fps, 3250 to 3450 in his 19" 300 RUM barrel.
This is really great if it's real!